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  2. 地质与地球物理研究所
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  4. 中国科学院地球与行星物理重点实验室
A New Technique to Diagnose the Geomagnetic Field Based on a Single Circular Current Loop Model

文献类型：期刊论文

作者Rong, Z. J.2,3,4; Wei, Y.2,3,4; Klinger, Lucy5; Yamauchi, M.1; Xu, W. Y.2; Kong, D. L.6; Cui, J.7; Shen, C.8; Yang, Y. Y.9; Zhu, R. X.2,3
刊名JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
出版日期2021-11-01
卷号126期号:11页码:15
ISSN号2169-9313
关键词geomagnetic field dipole field spherical harmonic analysis current loop dynamo currents planetary magnetic field
DOI10.1029/2021JB022778
英文摘要The geomagnetic field originates from interior dynamo currents and can be approximated well by a simple dipolar field in the vicinity of Earth's surface. Given that the dipolar field is induced by a current loop, it is possible to invert the loop parameters by tracing the sampled magnetic field geometry. Drawing on the analysis of field geometric structure with sampled field dataset, we develop, in this study, a new technique to invert the interior current source, which is based on a single circular current loop model. Unlike previous studies, this technique has the ability to separate and solve the optimal loop parameters successively, including the location of the loop center, the loop axis, the radius, and the carried electric current. Applications to the International Geomagnetic Reference Field and the sampled magnetic field dataset by the spacecraft of the Swarm mission demonstrate that our technique-derived loop center, loop axis, and magnetic moment are consistent with previous estimations by the eccentric dipole model, which shows the reasonability and effectiveness of this technique. Moreover, our technique can be reduced to fit an eccentric dipole model and is particularly useful for inversions of the geometry of interior current sources. Thus, it could be applied widely in the fields of planetary magnetism and palaeomagnetism. Further applications and constraints are discussed, with some cautions given.
WOS关键词EARTHS MAGNETIC-FIELD ; ECCENTRIC DIPOLE
资助项目National Natural Science Foundation of China[41774188] ; National Natural Science Foundation of China[41922031] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA17010201] ; Key Research Program of the Institute of Geology & Geophysics, CAS[IGGCAS-201904]
WOS研究方向Geochemistry & Geophysics
语种英语
出版者AMER GEOPHYSICAL UNION
WOS记录号WOS:000723102600046
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Key Research Program of the Institute of Geology & Geophysics, CAS ; Key Research Program of the Institute of Geology & Geophysics, CAS ; Key Research Program of the Institute of Geology & Geophysics, CAS ; Key Research Program of the Institute of Geology & Geophysics, CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Key Research Program of the Institute of Geology & Geophysics, CAS ; Key Research Program of the Institute of Geology & Geophysics, CAS ; Key Research Program of the Institute of Geology & Geophysics, CAS ; Key Research Program of the Institute of Geology & Geophysics, CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Key Research Program of the Institute of Geology & Geophysics, CAS ; Key Research Program of the Institute of Geology & Geophysics, CAS ; Key Research Program of the Institute of Geology & Geophysics, CAS ; Key Research Program of the Institute of Geology & Geophysics, CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Key Research Program of the Institute of Geology & Geophysics, CAS ; Key Research Program of the Institute of Geology & Geophysics, CAS ; Key Research Program of the Institute of Geology & Geophysics, CAS ; Key Research Program of the Institute of Geology & Geophysics, CAS
源URL[http://ir.iggcas.ac.cn/handle/132A11/103894]  
专题地质与地球物理研究所_中国科学院地球与行星物理重点实验室
通讯作者Rong, Z. J.
作者单位1.Swedish Inst Space Phys, Kiruna, Sweden
2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing, Peoples R China
3.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China
4.Chinese Acad Sci, Inst Geol & Geophys, Mohe Observ Geophys, Beijing, Peoples R China
5.Peking Univ, Beijing Int Ctr Math Res, Beijing, Peoples R China
6.Chinese Acad Sci, Shanghai Astron Observ, Shanghai, Peoples R China
7.Sun Yat Sen Univ, Sch Atmosphere Sci, Zhuha, Peoples R China
8.Harbin Inst Technol, Shenzhen, Peoples R China
9.Minist Emergency Management China, Natl Inst Nat Hazards, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Rong, Z. J.,Wei, Y.,Klinger, Lucy,et al. A New Technique to Diagnose the Geomagnetic Field Based on a Single Circular Current Loop Model[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2021,126(11):15.
APA Rong, Z. J..,Wei, Y..,Klinger, Lucy.,Yamauchi, M..,Xu, W. Y..,...&Chai, L. H..(2021).A New Technique to Diagnose the Geomagnetic Field Based on a Single Circular Current Loop Model.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,126(11),15.
MLA Rong, Z. J.,et al."A New Technique to Diagnose the Geomagnetic Field Based on a Single Circular Current Loop Model".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 126.11(2021):15.

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来源：地质与地球物理研究所

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